Realized there's another book I read that was recommended to me and I found helpful.
The Secret by Rhonda Byrne
It's a short book so it's a quick read. I found it very helpful in adjusting my attitude back to a consistent positive attitude. It's basic premise is by having a positive attitude and believing in what it is you are wanting or trying to achieve then it will happen. It also says that having a negative slant to thinking is just like thinking you don't want something. So a good example would be if you think "I don't want a divorce" then what'll happen is you'll get a divorce. So you should think in positive terms, "I want a happy, healthy, loving marriage with my wife." In the end its just saying the power of positive thinking is the secret to achieving your goals and a happy life.
If we really want to love, we must learn how to forgive. - Mother Theresa